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D. I-I. CAMPBELL. Sewlng Maohlne No' 241,610.

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Patented May 17,188L

UNITED STATES PATENT OFFICE.

DUNCAN H. CAMPBELL, OF PAWTUOKET, RHODE ISLAND, ASSIGNOR OFTHREE-FOURTHS TO HENRY B. METUALF, FRANK E. GOMEY, AND DANIEL MCNIVEN,ALL OF SAME PLAGE.

SEWING-MACHINE.

'SPECIFICATION forming part of Letters Patent No. 241,610, dated May 17,1881.

`,Applicattm filed May 14, 1879.

To all whom it may concern Be it known that I, DUNCAN H. CAMPBELL, ofPawtucket, in the county of Providence and State of Rhode Island, haveinvented certain new and useful Improvements in Sewing-Machines; and Ido hereby declare that the following specification,taken in connectionwith 'the drawings furnished and forming a part of the same, is a clear,true, and complete description of my invention.

' My said improvements relate to the shuttle, its rail and driver, andare particularly applicable to wax-thread machines in which ahookneedleand a centrally pointed shuttle are employed. The shuttle is termedcentrally pointed by me because its point, its axis, and the. path oftheneedle occupy the same plane.

In certain applications for Letters Patent filed by me May 13 and 14,1879, and designated, respectively, as Gases No. 1,77 A, 13, (3, D,7 and111, I have shown, described, and claimed certain combinations ofshuttles with rails of novel construction.

My present invention consists, in part, of the combination, with ashuttle-rail broken away to afford a path for a needle, of acentrallypointed shuttle provided with a longitudinallyrecessed webhaving flaring sides and inclined retaining-guides on each side of andparallel with the rail, which so engage with the vflaring sides of theshuttle-web as to prevent the rising of the shuttle on its rail. Theseretainingguides and the rail are preferably mounted in a bed-piece, andtheguides are adjustable with reference to the web of the shuttle whenon the rail, andV this particular construction constitutes anotherportion of my invention.

In certain other applications for Letters Patent recently led by me, andbefore herein referred to, I show and describe several shuttledriverssuitable for operating a shuttle mounted on a rail, and either of themmay be employed in connection with the shuttle, its rail, andretaining-guides, as hereinafter shown 5 and another fea-ture of myinvention consists in the combination, with a shuttle having a longitudi- Bally-recessed web -on its underside, a rail on 'which theshuttle is mounted, and retainingand secured thereon by retaining-guidespar-V allel with the rail for engaging with the web of the shuttle, of ashuttle-driver mounted upon a bed-piece which containsthe rail and theguides. To more particularly describe my invention l will refer to theaccompanying drawings, in which- Figure 1 represents the front portionof the bed ofa machine containing my improvements, a portion ofthe bedand frame being broken `away to show the shuttle and accompanying parts.Fig. 2 represents the same in cross vertical section. Fig. 3 representsthe rail bedpiece in top view, detached. Fig. 4. represents the shuttle-drver and its lever detached. Figs.

5 and 6 represent the shuttle respectively in side View andcross-section.

The hook-needle A is as heretofore, and rises to take its loop downward.

The shuttle-rail B is rectangular in cross-section, its upper edgesupporting the shuttle. It is broken away centrally at (t to afford apath for the needle, and is centrally mounted in a bed-piece, C, whichis secured at each end to the frame of the machine. On each side of therail, and mounted in the bed-piece, are retainin g-guides b, each havingan inclined front face coincident with the side of the rail and paralleltherewith. The bed-pieceis recessed vertically at intervals for thereception of gibs c for the guides, having each a set-screw, whereby theguides may be adjusted accurately with reference to the rail, or to theweb of a shuttle when mounted thereon. .Each guide extends from near thepath of the needle to the end of the rail. That portion of the railwhich is immediately in front of the needle serves as a stop forpreventing a loop from being carried forward bythe shuttle.

The shuttle-driver D is composed, in part, of a slide, d, fitted toembrace the bed-piece laterally, and is mounted thereon by means ofsplines which occupy guiding-grooves c on each side of the bed-piece. Ithas also a hinged bridle, f, which embraces the front end of a shuttlc,the heel of which is engaged by that portion of the slide d whichoverhangs the rail. Said carrier-bridle is the same as shown and claimedin certain other applications for Letters Patent led by me, hereinbeforereferred to. The driver is connected with its vibrating lever g by alink, h.

The centrally-pointed shuttle E has a lon gitudinally-recessed web onits under side, as heretofore; but said web is novel, as shown in thedrawings, in that it has flaring outer sides, as at t', they beingessential in this lnachine as a means whereby the shuttle is confined toits rail through the co-operation of the inclinedfaced retaining-guidesb. The shuttle may be removed from its rail by raising the bridle of thecarrier and then sliding the shuttle along the rail outward -through ahole in the side of the frame. As heretofore, the recessed web operatesas a east-off for freeing the loop from a hook-needle, and it also, asheretofore devised by me, serves asamedium bywhich it is mounted on itsrail and retained thereon. My present invention in this particularconnection therefore relates to the particular construction involved andto the combinations of mechanism specified.

The operation of the several parts is too well understood to require anyspecific description.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination, with a shuttle-rail broken awayto afford a path for a needle, of a centrally-pointed shuttle providedon its under side with a lon gitudinally-recessed web having Haringsides, and inclined retaining-guides on each side of and parallel withthe rail for confining the shuttle thereto, substantially as described.

2. The shuttle having a longitudinal recess on its under side, ashuttle-rail broken away centrally to afford a path for a needle, andparallel retaining-guides on each side of the rail, which are adjustablewith reference to the shuttle mounted on said rail, in combination witha bed-piece common to the guides and rail, substantially as described.

3. The combination, with a shuttle having a longitudinally-recessedflaring web on its under side, a shuttle-rail, and retaining-guides forengaging with the sh uttle-web7 of a shuttledriver, substantially asdescribed.

4. The combination,with the centrall ypoint-v ed web-shuttle, a centralrail, and retainingguides parallel with the rail, for engaging with theweb of the shuttle, of a shuttle-driver and a bed-piece containing therail and guides, substantially as described.

DUNCAN H. CAMPBELL.

Witnesses:

CHARLES E. DAVIS, Jos. E. J ENoKEs.

